![Kees Cook](/assets/img/avatar_default.png)
The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc(). This patch replaces cases of: devm_kzalloc(handle, a * b, gfp) with: devm_kcalloc(handle, a * b, gfp) as well as handling cases of: devm_kzalloc(handle, a * b * c, gfp) with: devm_kzalloc(handle, array3_size(a, b, c), gfp) as it's slightly less ugly than: devm_kcalloc(handle, array_size(a, b), c, gfp) This does, however, attempt to ignore constant size factors like: devm_kzalloc(handle, 4 * 1024, gfp) though any constants defined via macros get caught up in the conversion. Any factors with a sizeof() of "unsigned char", "char", and "u8" were dropped, since they're redundant. Some manual whitespace fixes were needed in this patch, as Coccinelle really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...". The Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ expression HANDLE; type TYPE; expression THING, E; @@ ( devm_kzalloc(HANDLE, - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | devm_kzalloc(HANDLE, - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression HANDLE; expression COUNT; typedef u8; typedef __u8; @@ ( devm_kzalloc(HANDLE, - sizeof(u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * COUNT + COUNT , ...) ) // 2-factor product with sizeof(type/expression) and identifier or constant. @@ expression HANDLE; type TYPE; expression THING; identifier COUNT_ID; constant COUNT_CONST; @@ ( - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ expression HANDLE; identifier SIZE, COUNT; @@ - devm_kzalloc + devm_kcalloc (HANDLE, - SIZE * COUNT + COUNT, SIZE , ...) // 3-factor product with 1 sizeof(type) or sizeof(expression), with // redundant parens removed. @@ expression HANDLE; expression THING; identifier STRIDE, COUNT; type TYPE; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) ) // 3-factor product with 2 sizeof(variable), with redundant parens removed. @@ expression HANDLE; expression THING1, THING2; identifier COUNT; type TYPE1, TYPE2; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) ) // 3-factor product, only identifiers, with redundant parens removed. @@ expression HANDLE; identifier STRIDE, SIZE, COUNT; @@ ( devm_kzalloc(HANDLE, - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) ) // Any remaining multi-factor products, first at least 3-factor products, // when they're not all constants... @@ expression HANDLE; expression E1, E2, E3; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - E1 * E2 * E3 + array3_size(E1, E2, E3) , ...) ) // And then all remaining 2 factors products when they're not all constants, // keeping sizeof() as the second factor argument. @@ expression HANDLE; expression THING, E1, E2; type TYPE; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, sizeof(THING) * C2, ...) | devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...) | devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, C1 * C2, ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * E2 + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * (E2) + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
741 lines
18 KiB
C
741 lines
18 KiB
C
/*
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* Driver for the NVIDIA Tegra pinmux
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*
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* Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved.
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*
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* Derived from code:
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* Copyright (C) 2010 Google, Inc.
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* Copyright (C) 2010 NVIDIA Corporation
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* Copyright (C) 2009-2011 ST-Ericsson AB
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/pinctrl/machine.h>
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#include <linux/pinctrl/pinctrl.h>
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#include <linux/pinctrl/pinmux.h>
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#include <linux/pinctrl/pinconf.h>
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#include <linux/slab.h>
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#include "../core.h"
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#include "../pinctrl-utils.h"
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#include "pinctrl-tegra.h"
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static inline u32 pmx_readl(struct tegra_pmx *pmx, u32 bank, u32 reg)
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{
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return readl(pmx->regs[bank] + reg);
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}
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static inline void pmx_writel(struct tegra_pmx *pmx, u32 val, u32 bank, u32 reg)
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{
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writel(val, pmx->regs[bank] + reg);
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}
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static int tegra_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
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{
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struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
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return pmx->soc->ngroups;
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}
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static const char *tegra_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
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unsigned group)
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{
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struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
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return pmx->soc->groups[group].name;
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}
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static int tegra_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
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unsigned group,
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const unsigned **pins,
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unsigned *num_pins)
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{
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struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
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*pins = pmx->soc->groups[group].pins;
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*num_pins = pmx->soc->groups[group].npins;
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return 0;
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}
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#ifdef CONFIG_DEBUG_FS
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static void tegra_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
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struct seq_file *s,
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unsigned offset)
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{
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seq_printf(s, " %s", dev_name(pctldev->dev));
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}
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#endif
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static const struct cfg_param {
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const char *property;
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enum tegra_pinconf_param param;
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} cfg_params[] = {
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{"nvidia,pull", TEGRA_PINCONF_PARAM_PULL},
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{"nvidia,tristate", TEGRA_PINCONF_PARAM_TRISTATE},
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{"nvidia,enable-input", TEGRA_PINCONF_PARAM_ENABLE_INPUT},
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{"nvidia,open-drain", TEGRA_PINCONF_PARAM_OPEN_DRAIN},
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{"nvidia,lock", TEGRA_PINCONF_PARAM_LOCK},
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{"nvidia,io-reset", TEGRA_PINCONF_PARAM_IORESET},
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{"nvidia,rcv-sel", TEGRA_PINCONF_PARAM_RCV_SEL},
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{"nvidia,io-hv", TEGRA_PINCONF_PARAM_RCV_SEL},
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{"nvidia,high-speed-mode", TEGRA_PINCONF_PARAM_HIGH_SPEED_MODE},
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{"nvidia,schmitt", TEGRA_PINCONF_PARAM_SCHMITT},
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{"nvidia,low-power-mode", TEGRA_PINCONF_PARAM_LOW_POWER_MODE},
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{"nvidia,pull-down-strength", TEGRA_PINCONF_PARAM_DRIVE_DOWN_STRENGTH},
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{"nvidia,pull-up-strength", TEGRA_PINCONF_PARAM_DRIVE_UP_STRENGTH},
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{"nvidia,slew-rate-falling", TEGRA_PINCONF_PARAM_SLEW_RATE_FALLING},
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{"nvidia,slew-rate-rising", TEGRA_PINCONF_PARAM_SLEW_RATE_RISING},
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{"nvidia,drive-type", TEGRA_PINCONF_PARAM_DRIVE_TYPE},
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};
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static int tegra_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
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struct device_node *np,
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struct pinctrl_map **map,
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unsigned *reserved_maps,
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unsigned *num_maps)
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{
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struct device *dev = pctldev->dev;
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int ret, i;
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const char *function;
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u32 val;
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unsigned long config;
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unsigned long *configs = NULL;
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unsigned num_configs = 0;
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unsigned reserve;
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struct property *prop;
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const char *group;
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ret = of_property_read_string(np, "nvidia,function", &function);
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if (ret < 0) {
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/* EINVAL=missing, which is fine since it's optional */
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if (ret != -EINVAL)
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dev_err(dev,
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"could not parse property nvidia,function\n");
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function = NULL;
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}
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for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
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ret = of_property_read_u32(np, cfg_params[i].property, &val);
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if (!ret) {
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config = TEGRA_PINCONF_PACK(cfg_params[i].param, val);
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ret = pinctrl_utils_add_config(pctldev, &configs,
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&num_configs, config);
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if (ret < 0)
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goto exit;
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/* EINVAL=missing, which is fine since it's optional */
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} else if (ret != -EINVAL) {
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dev_err(dev, "could not parse property %s\n",
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cfg_params[i].property);
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}
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}
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reserve = 0;
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if (function != NULL)
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reserve++;
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if (num_configs)
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reserve++;
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ret = of_property_count_strings(np, "nvidia,pins");
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if (ret < 0) {
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dev_err(dev, "could not parse property nvidia,pins\n");
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goto exit;
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}
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reserve *= ret;
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ret = pinctrl_utils_reserve_map(pctldev, map, reserved_maps,
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num_maps, reserve);
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if (ret < 0)
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goto exit;
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of_property_for_each_string(np, "nvidia,pins", prop, group) {
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if (function) {
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ret = pinctrl_utils_add_map_mux(pctldev, map,
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reserved_maps, num_maps, group,
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function);
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if (ret < 0)
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goto exit;
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}
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if (num_configs) {
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ret = pinctrl_utils_add_map_configs(pctldev, map,
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reserved_maps, num_maps, group,
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configs, num_configs,
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PIN_MAP_TYPE_CONFIGS_GROUP);
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if (ret < 0)
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goto exit;
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}
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}
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ret = 0;
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exit:
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kfree(configs);
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return ret;
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}
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static int tegra_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
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struct device_node *np_config,
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struct pinctrl_map **map,
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unsigned *num_maps)
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{
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unsigned reserved_maps;
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struct device_node *np;
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int ret;
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reserved_maps = 0;
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*map = NULL;
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*num_maps = 0;
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for_each_child_of_node(np_config, np) {
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ret = tegra_pinctrl_dt_subnode_to_map(pctldev, np, map,
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&reserved_maps, num_maps);
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if (ret < 0) {
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pinctrl_utils_free_map(pctldev, *map,
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*num_maps);
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of_node_put(np);
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return ret;
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}
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}
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return 0;
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}
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static const struct pinctrl_ops tegra_pinctrl_ops = {
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.get_groups_count = tegra_pinctrl_get_groups_count,
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.get_group_name = tegra_pinctrl_get_group_name,
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.get_group_pins = tegra_pinctrl_get_group_pins,
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#ifdef CONFIG_DEBUG_FS
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.pin_dbg_show = tegra_pinctrl_pin_dbg_show,
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#endif
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.dt_node_to_map = tegra_pinctrl_dt_node_to_map,
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.dt_free_map = pinctrl_utils_free_map,
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};
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static int tegra_pinctrl_get_funcs_count(struct pinctrl_dev *pctldev)
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{
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struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
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return pmx->soc->nfunctions;
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}
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static const char *tegra_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
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unsigned function)
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{
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struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
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return pmx->soc->functions[function].name;
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}
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static int tegra_pinctrl_get_func_groups(struct pinctrl_dev *pctldev,
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unsigned function,
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const char * const **groups,
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unsigned * const num_groups)
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{
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struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
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*groups = pmx->soc->functions[function].groups;
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*num_groups = pmx->soc->functions[function].ngroups;
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return 0;
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}
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static int tegra_pinctrl_set_mux(struct pinctrl_dev *pctldev,
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unsigned function,
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unsigned group)
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{
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struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
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const struct tegra_pingroup *g;
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int i;
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u32 val;
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g = &pmx->soc->groups[group];
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if (WARN_ON(g->mux_reg < 0))
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return -EINVAL;
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for (i = 0; i < ARRAY_SIZE(g->funcs); i++) {
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if (g->funcs[i] == function)
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break;
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}
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if (WARN_ON(i == ARRAY_SIZE(g->funcs)))
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return -EINVAL;
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val = pmx_readl(pmx, g->mux_bank, g->mux_reg);
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val &= ~(0x3 << g->mux_bit);
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val |= i << g->mux_bit;
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pmx_writel(pmx, val, g->mux_bank, g->mux_reg);
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return 0;
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}
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static const struct pinmux_ops tegra_pinmux_ops = {
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.get_functions_count = tegra_pinctrl_get_funcs_count,
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.get_function_name = tegra_pinctrl_get_func_name,
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.get_function_groups = tegra_pinctrl_get_func_groups,
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.set_mux = tegra_pinctrl_set_mux,
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};
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static int tegra_pinconf_reg(struct tegra_pmx *pmx,
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const struct tegra_pingroup *g,
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enum tegra_pinconf_param param,
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bool report_err,
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s8 *bank, s16 *reg, s8 *bit, s8 *width)
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{
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switch (param) {
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case TEGRA_PINCONF_PARAM_PULL:
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*bank = g->pupd_bank;
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*reg = g->pupd_reg;
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*bit = g->pupd_bit;
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*width = 2;
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break;
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case TEGRA_PINCONF_PARAM_TRISTATE:
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*bank = g->tri_bank;
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*reg = g->tri_reg;
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*bit = g->tri_bit;
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*width = 1;
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break;
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case TEGRA_PINCONF_PARAM_ENABLE_INPUT:
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*bank = g->mux_bank;
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*reg = g->mux_reg;
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*bit = g->einput_bit;
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*width = 1;
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break;
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case TEGRA_PINCONF_PARAM_OPEN_DRAIN:
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*bank = g->mux_bank;
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*reg = g->mux_reg;
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*bit = g->odrain_bit;
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*width = 1;
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break;
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case TEGRA_PINCONF_PARAM_LOCK:
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*bank = g->mux_bank;
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*reg = g->mux_reg;
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*bit = g->lock_bit;
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*width = 1;
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break;
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case TEGRA_PINCONF_PARAM_IORESET:
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*bank = g->mux_bank;
|
|
*reg = g->mux_reg;
|
|
*bit = g->ioreset_bit;
|
|
*width = 1;
|
|
break;
|
|
case TEGRA_PINCONF_PARAM_RCV_SEL:
|
|
*bank = g->mux_bank;
|
|
*reg = g->mux_reg;
|
|
*bit = g->rcv_sel_bit;
|
|
*width = 1;
|
|
break;
|
|
case TEGRA_PINCONF_PARAM_HIGH_SPEED_MODE:
|
|
if (pmx->soc->hsm_in_mux) {
|
|
*bank = g->mux_bank;
|
|
*reg = g->mux_reg;
|
|
} else {
|
|
*bank = g->drv_bank;
|
|
*reg = g->drv_reg;
|
|
}
|
|
*bit = g->hsm_bit;
|
|
*width = 1;
|
|
break;
|
|
case TEGRA_PINCONF_PARAM_SCHMITT:
|
|
if (pmx->soc->schmitt_in_mux) {
|
|
*bank = g->mux_bank;
|
|
*reg = g->mux_reg;
|
|
} else {
|
|
*bank = g->drv_bank;
|
|
*reg = g->drv_reg;
|
|
}
|
|
*bit = g->schmitt_bit;
|
|
*width = 1;
|
|
break;
|
|
case TEGRA_PINCONF_PARAM_LOW_POWER_MODE:
|
|
*bank = g->drv_bank;
|
|
*reg = g->drv_reg;
|
|
*bit = g->lpmd_bit;
|
|
*width = 2;
|
|
break;
|
|
case TEGRA_PINCONF_PARAM_DRIVE_DOWN_STRENGTH:
|
|
*bank = g->drv_bank;
|
|
*reg = g->drv_reg;
|
|
*bit = g->drvdn_bit;
|
|
*width = g->drvdn_width;
|
|
break;
|
|
case TEGRA_PINCONF_PARAM_DRIVE_UP_STRENGTH:
|
|
*bank = g->drv_bank;
|
|
*reg = g->drv_reg;
|
|
*bit = g->drvup_bit;
|
|
*width = g->drvup_width;
|
|
break;
|
|
case TEGRA_PINCONF_PARAM_SLEW_RATE_FALLING:
|
|
*bank = g->drv_bank;
|
|
*reg = g->drv_reg;
|
|
*bit = g->slwf_bit;
|
|
*width = g->slwf_width;
|
|
break;
|
|
case TEGRA_PINCONF_PARAM_SLEW_RATE_RISING:
|
|
*bank = g->drv_bank;
|
|
*reg = g->drv_reg;
|
|
*bit = g->slwr_bit;
|
|
*width = g->slwr_width;
|
|
break;
|
|
case TEGRA_PINCONF_PARAM_DRIVE_TYPE:
|
|
if (pmx->soc->drvtype_in_mux) {
|
|
*bank = g->mux_bank;
|
|
*reg = g->mux_reg;
|
|
} else {
|
|
*bank = g->drv_bank;
|
|
*reg = g->drv_reg;
|
|
}
|
|
*bit = g->drvtype_bit;
|
|
*width = 2;
|
|
break;
|
|
default:
|
|
dev_err(pmx->dev, "Invalid config param %04x\n", param);
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
if (*reg < 0 || *bit < 0) {
|
|
if (report_err) {
|
|
const char *prop = "unknown";
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
|
|
if (cfg_params[i].param == param) {
|
|
prop = cfg_params[i].property;
|
|
break;
|
|
}
|
|
}
|
|
|
|
dev_err(pmx->dev,
|
|
"Config param %04x (%s) not supported on group %s\n",
|
|
param, prop, g->name);
|
|
}
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_pinconf_get(struct pinctrl_dev *pctldev,
|
|
unsigned pin, unsigned long *config)
|
|
{
|
|
dev_err(pctldev->dev, "pin_config_get op not supported\n");
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
static int tegra_pinconf_set(struct pinctrl_dev *pctldev,
|
|
unsigned pin, unsigned long *configs,
|
|
unsigned num_configs)
|
|
{
|
|
dev_err(pctldev->dev, "pin_config_set op not supported\n");
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
static int tegra_pinconf_group_get(struct pinctrl_dev *pctldev,
|
|
unsigned group, unsigned long *config)
|
|
{
|
|
struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
|
|
enum tegra_pinconf_param param = TEGRA_PINCONF_UNPACK_PARAM(*config);
|
|
u16 arg;
|
|
const struct tegra_pingroup *g;
|
|
int ret;
|
|
s8 bank, bit, width;
|
|
s16 reg;
|
|
u32 val, mask;
|
|
|
|
g = &pmx->soc->groups[group];
|
|
|
|
ret = tegra_pinconf_reg(pmx, g, param, true, &bank, ®, &bit,
|
|
&width);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
val = pmx_readl(pmx, bank, reg);
|
|
mask = (1 << width) - 1;
|
|
arg = (val >> bit) & mask;
|
|
|
|
*config = TEGRA_PINCONF_PACK(param, arg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_pinconf_group_set(struct pinctrl_dev *pctldev,
|
|
unsigned group, unsigned long *configs,
|
|
unsigned num_configs)
|
|
{
|
|
struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
|
|
enum tegra_pinconf_param param;
|
|
u16 arg;
|
|
const struct tegra_pingroup *g;
|
|
int ret, i;
|
|
s8 bank, bit, width;
|
|
s16 reg;
|
|
u32 val, mask;
|
|
|
|
g = &pmx->soc->groups[group];
|
|
|
|
for (i = 0; i < num_configs; i++) {
|
|
param = TEGRA_PINCONF_UNPACK_PARAM(configs[i]);
|
|
arg = TEGRA_PINCONF_UNPACK_ARG(configs[i]);
|
|
|
|
ret = tegra_pinconf_reg(pmx, g, param, true, &bank, ®, &bit,
|
|
&width);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
val = pmx_readl(pmx, bank, reg);
|
|
|
|
/* LOCK can't be cleared */
|
|
if (param == TEGRA_PINCONF_PARAM_LOCK) {
|
|
if ((val & BIT(bit)) && !arg) {
|
|
dev_err(pctldev->dev, "LOCK bit cannot be cleared\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/* Special-case Boolean values; allow any non-zero as true */
|
|
if (width == 1)
|
|
arg = !!arg;
|
|
|
|
/* Range-check user-supplied value */
|
|
mask = (1 << width) - 1;
|
|
if (arg & ~mask) {
|
|
dev_err(pctldev->dev,
|
|
"config %lx: %x too big for %d bit register\n",
|
|
configs[i], arg, width);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Update register */
|
|
val &= ~(mask << bit);
|
|
val |= arg << bit;
|
|
pmx_writel(pmx, val, bank, reg);
|
|
} /* for each config */
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
static void tegra_pinconf_dbg_show(struct pinctrl_dev *pctldev,
|
|
struct seq_file *s, unsigned offset)
|
|
{
|
|
}
|
|
|
|
static const char *strip_prefix(const char *s)
|
|
{
|
|
const char *comma = strchr(s, ',');
|
|
if (!comma)
|
|
return s;
|
|
|
|
return comma + 1;
|
|
}
|
|
|
|
static void tegra_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
|
|
struct seq_file *s, unsigned group)
|
|
{
|
|
struct tegra_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
|
|
const struct tegra_pingroup *g;
|
|
int i, ret;
|
|
s8 bank, bit, width;
|
|
s16 reg;
|
|
u32 val;
|
|
|
|
g = &pmx->soc->groups[group];
|
|
|
|
for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
|
|
ret = tegra_pinconf_reg(pmx, g, cfg_params[i].param, false,
|
|
&bank, ®, &bit, &width);
|
|
if (ret < 0)
|
|
continue;
|
|
|
|
val = pmx_readl(pmx, bank, reg);
|
|
val >>= bit;
|
|
val &= (1 << width) - 1;
|
|
|
|
seq_printf(s, "\n\t%s=%u",
|
|
strip_prefix(cfg_params[i].property), val);
|
|
}
|
|
}
|
|
|
|
static void tegra_pinconf_config_dbg_show(struct pinctrl_dev *pctldev,
|
|
struct seq_file *s,
|
|
unsigned long config)
|
|
{
|
|
enum tegra_pinconf_param param = TEGRA_PINCONF_UNPACK_PARAM(config);
|
|
u16 arg = TEGRA_PINCONF_UNPACK_ARG(config);
|
|
const char *pname = "unknown";
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
|
|
if (cfg_params[i].param == param) {
|
|
pname = cfg_params[i].property;
|
|
break;
|
|
}
|
|
}
|
|
|
|
seq_printf(s, "%s=%d", strip_prefix(pname), arg);
|
|
}
|
|
#endif
|
|
|
|
static const struct pinconf_ops tegra_pinconf_ops = {
|
|
.pin_config_get = tegra_pinconf_get,
|
|
.pin_config_set = tegra_pinconf_set,
|
|
.pin_config_group_get = tegra_pinconf_group_get,
|
|
.pin_config_group_set = tegra_pinconf_group_set,
|
|
#ifdef CONFIG_DEBUG_FS
|
|
.pin_config_dbg_show = tegra_pinconf_dbg_show,
|
|
.pin_config_group_dbg_show = tegra_pinconf_group_dbg_show,
|
|
.pin_config_config_dbg_show = tegra_pinconf_config_dbg_show,
|
|
#endif
|
|
};
|
|
|
|
static struct pinctrl_gpio_range tegra_pinctrl_gpio_range = {
|
|
.name = "Tegra GPIOs",
|
|
.id = 0,
|
|
.base = 0,
|
|
};
|
|
|
|
static struct pinctrl_desc tegra_pinctrl_desc = {
|
|
.pctlops = &tegra_pinctrl_ops,
|
|
.pmxops = &tegra_pinmux_ops,
|
|
.confops = &tegra_pinconf_ops,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static void tegra_pinctrl_clear_parked_bits(struct tegra_pmx *pmx)
|
|
{
|
|
int i = 0;
|
|
const struct tegra_pingroup *g;
|
|
u32 val;
|
|
|
|
for (i = 0; i < pmx->soc->ngroups; ++i) {
|
|
g = &pmx->soc->groups[i];
|
|
if (g->parked_bit >= 0) {
|
|
val = pmx_readl(pmx, g->mux_bank, g->mux_reg);
|
|
val &= ~(1 << g->parked_bit);
|
|
pmx_writel(pmx, val, g->mux_bank, g->mux_reg);
|
|
}
|
|
}
|
|
}
|
|
|
|
static bool gpio_node_has_range(void)
|
|
{
|
|
struct device_node *np;
|
|
bool has_prop = false;
|
|
|
|
np = of_find_compatible_node(NULL, NULL, "nvidia,tegra30-gpio");
|
|
if (!np)
|
|
return has_prop;
|
|
|
|
has_prop = of_find_property(np, "gpio-ranges", NULL);
|
|
|
|
of_node_put(np);
|
|
|
|
return has_prop;
|
|
}
|
|
|
|
int tegra_pinctrl_probe(struct platform_device *pdev,
|
|
const struct tegra_pinctrl_soc_data *soc_data)
|
|
{
|
|
struct tegra_pmx *pmx;
|
|
struct resource *res;
|
|
int i;
|
|
const char **group_pins;
|
|
int fn, gn, gfn;
|
|
|
|
pmx = devm_kzalloc(&pdev->dev, sizeof(*pmx), GFP_KERNEL);
|
|
if (!pmx)
|
|
return -ENOMEM;
|
|
|
|
pmx->dev = &pdev->dev;
|
|
pmx->soc = soc_data;
|
|
|
|
/*
|
|
* Each mux group will appear in 4 functions' list of groups.
|
|
* This over-allocates slightly, since not all groups are mux groups.
|
|
*/
|
|
pmx->group_pins = devm_kcalloc(&pdev->dev,
|
|
soc_data->ngroups * 4, sizeof(*pmx->group_pins),
|
|
GFP_KERNEL);
|
|
if (!pmx->group_pins)
|
|
return -ENOMEM;
|
|
|
|
group_pins = pmx->group_pins;
|
|
for (fn = 0; fn < soc_data->nfunctions; fn++) {
|
|
struct tegra_function *func = &soc_data->functions[fn];
|
|
|
|
func->groups = group_pins;
|
|
|
|
for (gn = 0; gn < soc_data->ngroups; gn++) {
|
|
const struct tegra_pingroup *g = &soc_data->groups[gn];
|
|
|
|
if (g->mux_reg == -1)
|
|
continue;
|
|
|
|
for (gfn = 0; gfn < 4; gfn++)
|
|
if (g->funcs[gfn] == fn)
|
|
break;
|
|
if (gfn == 4)
|
|
continue;
|
|
|
|
BUG_ON(group_pins - pmx->group_pins >=
|
|
soc_data->ngroups * 4);
|
|
*group_pins++ = g->name;
|
|
func->ngroups++;
|
|
}
|
|
}
|
|
|
|
tegra_pinctrl_gpio_range.npins = pmx->soc->ngpios;
|
|
tegra_pinctrl_desc.name = dev_name(&pdev->dev);
|
|
tegra_pinctrl_desc.pins = pmx->soc->pins;
|
|
tegra_pinctrl_desc.npins = pmx->soc->npins;
|
|
|
|
for (i = 0; ; i++) {
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, i);
|
|
if (!res)
|
|
break;
|
|
}
|
|
pmx->nbanks = i;
|
|
|
|
pmx->regs = devm_kcalloc(&pdev->dev, pmx->nbanks, sizeof(*pmx->regs),
|
|
GFP_KERNEL);
|
|
if (!pmx->regs)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < pmx->nbanks; i++) {
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, i);
|
|
pmx->regs[i] = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(pmx->regs[i]))
|
|
return PTR_ERR(pmx->regs[i]);
|
|
}
|
|
|
|
pmx->pctl = devm_pinctrl_register(&pdev->dev, &tegra_pinctrl_desc, pmx);
|
|
if (IS_ERR(pmx->pctl)) {
|
|
dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
|
|
return PTR_ERR(pmx->pctl);
|
|
}
|
|
|
|
tegra_pinctrl_clear_parked_bits(pmx);
|
|
|
|
if (!gpio_node_has_range())
|
|
pinctrl_add_gpio_range(pmx->pctl, &tegra_pinctrl_gpio_range);
|
|
|
|
platform_set_drvdata(pdev, pmx);
|
|
|
|
dev_dbg(&pdev->dev, "Probed Tegra pinctrl driver\n");
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(tegra_pinctrl_probe);
|